电子信息工程外文翻译外文文献英文文献文献翻译.doc

该【电子信息工程外文翻译外文文献英文文献文献翻译 】是由【Seiryu】上传分享，文档一共【16】页，该文档可以免费在线阅读，需要了解更多关于【电子信息工程外文翻译外文文献英文文献文献翻译 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。TechnologyandApplicationofFieldbusControlSystem---------Intelligent
Equipment&MeasurementAndControlSystemBasedonDeviceNet
Promotedbythenewtechnologicalrevolutionthatautomationcontroltechnologyistendingdigitizationandinternetinthefieldofautomationindustry,ShanghaiAtonElectricCo.,&MeasurementAndControlSystemBasedonDeviceNetasahighandnewtechnology
-.,,relyingonShanghaiElectric(Group)Corporation;constructedmeasurementandcontrolsystemFCSR&DcenterofintelligentcontrollerofpumpandvalveandbuiltupmassproductionR&Dbasis,cooperatingwithShanghaiJiaotongUniversityandShanghaiUniversity;constructedFCSremotediagnosisandservicecenterofintelligentcontrollerofpumpandvalve;constructedFCStrainingcenterofintelligentcontrollerofpumpandvalve;foundedmassproductionR&DbasisalongwiththeRockwellLaboratoryofShanghaiJiaotongUniversityandCIMSCenter.
1Summary
(1)Fieldbuscontrolsystemisasystemappliedtofieldofproductionandmicrocomputerizedmeasurementcontrolequipmenttorealizeboth--levelcontrolnetworkforopen,digitalandmultiplespotcommunications.
Application:FlowControlSystemofManufacturing;ProcessControlSystem;TrafficControl&Management;:Fieldbuscontrolsystemislow-levellow-.
(2)DifferencebetweenFCSandDCS,,'
concentrationwithdeconcentrationinDCSintonew--to-oneequipmenttie-,allinput/,,whichrealizesthoroughdecentralizedcontrol.
FCSadoptsdigitalsignalstoreplaceanalogsignalssothatmultiplesignals(includingmultipleoperatingparametervalues,devicestatusandfailureinformation),.
(3)CharacteristicsofFCS
?OpenSystem;
?Interoperability;
?replaceabilityofdevicesmadebydifferentmanufacturers.
?IntelligentizeandAutonomy;
?Fieldequipmentcompletingbasicfunctionsofautomaticcontrol.
?DecentralizedSystemStructure;
?FieldAdaptability;
?RelativelyStrongInterferenceKillingFeatureandSafety
?Intelligentizedlocalequipmentcansaveinvestmentandquantityofhardware
?Savinginstallationexpensesandcables
?Savingdailymaintenanceexpenses
?Enhancingaccuracyandreliabilityofsystem
?Enhancinginitiativenessofsystemintegrationforusers
(4)DevelopmentBackgroundandTrendofFieldbusControlSystem,With
therapiddevelopmentofcomputerandcomputernetwork,FCShasbeenrapidlydevelopedastheinterlinkedcommunicationnetworkbetweenthefieldintelligent
devicesinthefieldofprocessautomation,,networkandintellectualized,,.
2APPLICATIONOFRELAY
:,,theusershouldpayattentiontothefollowingitems.

Itisbesttochoosethecoilapplicativevoltageaccordingtotheratedvoltageindesign,,,,,energizing(orreturn)pulsewidthshouldnotlessthan3timesoftheoperating(orreturn)time,otherwise,therelaywouldbeleftonthemiddle--statecomponentstoenergizethecoil,thecomponentsdielectricstrengthmustbeabove80V,andtheleakageofcurrentmustbeaslittleaspossibletoensuretherelaytorelease.
Energizingpowersource:Under110%oftheratedcurrent,theadjustingratioofthepowersourceislessthan10%(ortheoutputimpedanceislessthan5%ofthecoil
impedance),thewavevoltageoftheDCpowersourceislessthan5%.TheACwaveissinewave;~;wavedistortioniswithin?10%;thefrequencychangeiswithin?1Hzor?1%ofthespecifiedfrequency
(choosingthebiggervalue).Theoutputpowershouldnotlessthancoilpowerconsumption.

Atthemomentwhenthecoilpowerisstopped,peak-inversevoltagethatismorethan30timesofthecoilratedvoltageisproducedonthecoil,,thepeak-inversevoltageissuppressedbytransientsuppression(cutting-peak)diodeorresistancetolimitthepeak-inversevoltage
~,
connectionandseriesconnection,Whenseveralrelaysinparallelconnectionare
supplied,therelaythatthepeak-inversevoltageishigherwillreleasepowertothe
relaysthatthepeak-.
Therelayswithdifferentcoilresistanceandpowercan’tbeusedinseries,otherwise,therelaythatthecoilcurrentishigherintheseriescircuitcan’,butthepeak-inversevoltagewillbeincreasedandthepeak-
’tbeusedin
’talwaysreliablyoperateinlowlevelload(lessthan10mA×6A)-phaseACpowersourceisn’talwayssuitabletoswitchtwosingle-phaseAC
loadsthataren’tsynchronous;therelaythatisonlyspecifiedtoswitchtheloadofAC
50Hz(or60Hz)can’tbeusedtoswitchACloadof400Hz.

Thecontactsusedinparallelconnectioncan’tincreasetheloadcurrent,becausetheoperatingtimesofseveralsetsofcontactsareabsolutelydifferent;thatistosay,’“break”.Buttheparallelconnectionofthe
contactswouldincreasethemisplayof“freezing”.Becausethemisplayof“break”isthemainpatternofinvalidationofcontacts,%oftheratedvoltage,otherwise,“freezing”,butitwouldincreasethemisplayof“break”.Anyway,whenusingredundanttechnologyto
increasetheoperatingreliabilityofcontacts,thecharacteristicsandsizeandthefailuremodeofloadmustbeconsidered.

Theswitchingspeedshouldnotexceedthereciprocalof10timesofthesumofoperatingandreleasetime(times/s),otherwise,thecontactscan’,orthecoilmaybedamaged.
3RVTDISTRIBUTINGELECTRICITYINTEGRATETEST
APPARATUS
Basicfunction
Measureasupervision:Threemutuallyelectricvoltage/electriccurrent/powerfactorwithagreatachievement/powerwithoutagreatachievement/electricitywithagreatachiverment/electricity/homophonic-waveelectricvoltage/homophonic-waveelectric/currentDayelectricvoltage/electriccurrentbiggestandminimumvalue/fireforthefailureElectricvoltageovertop,thelimit/lackmutuallyoftimehomophonic-
RS232/485communicatingconnect,Thewayincommunicatingcanadoptthe
spotcommunicatingorthelongrangecommunicating.,Possibletosettleinvokeor
thesolidhourinvokes,respondingtothemodificationandlongrangescontroloftheparameter.
Withoutpowercompensation
Takingphysicsmeasuresasthepowerfactorwithoutagreatachievement,thepowerfactorwithagreatachievementandthedullplacewithoutpowercompensation;Y+thecombinationmethodofthe?,Y+the?connectstheline
method,Y+?,Y,the?connectsthelinemethod.
Datamanagement
AccordingtoWINDOW98operationterrace,dataincommunicationautomaticallyreportsbornstatement,curveandpillarformdiagrams.
Circulationoftheprotection
Whenthechargedbarbedwirenetofmutuallyelectricvoltageoverpress,owetopress,andasuperlimithourfastcutoffinexpiationofcapacitor,Whenthecharged
barbedwirenetlacksmutuallyorsuperlimitintheprefaceofzerohourfastcutoffinexpiationofcapacitor.
screenmanifestation
Chineseoperationinterface,Adopt128*64thebacklightliquidcrystal
.
现场总线控制系统的技术和应用
随着新的科学技术革命的出现,在自动化工业领域中,自动控制技术的发展趋向于数字化和网络互联化。上海Aton电气有限公司在基于DeviceNet网络协议研制了智能设备、智能测量法和只能控制系统,建立了工业化高新技术工程模型。这是2000年国家重点发展的高科技项目,并且由国家科技委员会认可。通过上海电气集团,上海Aton电气有限公司构造了汞和阀门的智能控制器的的生产线;创立了汞和阀门的智能控制器的现场控制系统的研发中心,通过和上海交通大学和上海大学的合作,建立了产品集成的研发基础;建立了汞和阀门的智能控制器的现场控制系统的远程诊断和服务中心;建立了汞和阀门智能控制系统的现场控制系统的培训中心;通过和上海交通大学洛氏实验室和计算机集成制造系统中心的合作,建立了集成产品研发的基础。